Top new questions this week:
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Standard belief is that the floppy disk controllers used on PCs are incapable of reading Amiga floppy disks, due to the PC disk controller expecting a very specific low-level format of disks, whilst ...
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Some of the early PC 3D graphics cards such as the 3dfx Voodoo Graphics cards had a passthrough port to enable them to switch to a secondary card to display 2D graphics.
I am curious to know why these ...
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The C64 has two Time of Day (TOD) clocks, one in each of its 6526 CIA
chips U1 and U2. These calculate time based on a 60 Hz or 50 Hz
input to the TOD pin (pin 19); the clock input frequency assumed ...
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RFC 309 is an announcement of the 1972 Data and File Transfer Workshop announcement. The suggested reading section has 12 entries, 11 of which are RFCs and the last of which is:
8. Data ...
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I've recently acquired an Apple IIc. The internal 5.25" drive does
seem to make appropriate noises at boot, but I do not (at least not
yet) have any floppy disks, with software or otherwise. It's an
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Hello: I have an old Seagate ST-238R drive. I'm the original owner and it stopped working in the early-90s when I foolishly deleted system files to make room for a football game. (I was 12 at the ...
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I remember using a utility back in MS Dos 3.3 days, called maxi-disk, that somehow magically managed to get 420K on a 360K 5 1/4" disks. I assume it managed it by destroying some redundancy like a ...
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Greatest hits from previous weeks:
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When a Nintendo Game Boy is turned on, it displays a logo read from the cartridge (looking like this) before starting the game. What does it display if there's no cartridge inserted from which to read ...
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I imagine it being a huge downgrade for some, not to have color on the Macintosh. Macintosh games were black and white in the beginning, while Apple II had color.
I'm especially interested in ...
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Most home electrical appliances use a fixed power cord and have a on/off switch near the front. I was in many government electronics labs and that cord and socket was not used i.e HP test equipment.
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I am learning about old computers, and I have found the following image from this article:
They use the terms "UART" instead of "serial port" and "UART driver" instead of "serial port driver", I ...
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I'm studying the 65c816 assembly for the 1994 game, Super Metroid.
A hobbyist studied the game in-depth and created a RAM map. From it:
7E:0B56 - 7E:0B57 Moves Samus this distance horizontally, ...
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I have heard that the reason the i variable is used so much is because there was an old computer where each variable could only be a single letter and that reserved the variables a through h as ...
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ed was the standard Unix editor, and is present on all POSIX certified systems (though it's not installed by default in Debian, FWIW).
It's a line editor (meaning, you can't see all the text at a ...
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